Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/192115
Title: | Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys |
Author: | Cong, Daoyong Xiong, Wenxin Planes Vila, Antoni Ren, Yang Mañosa, Lluís Cao, Peiyu Nie, Zhihua Sun, Xiaoming Yang, Zhi Hong, Xiufeng Wang, Yandong |
Keywords: | Aliatges Termodinàmica Ciència dels materials Alloys Thermodynamics Materials science |
Issue Date: | 26-Jun-2019 |
Publisher: | American Physical Society |
Abstract: | Energy-efficient and environment-friendly elastocaloric refrigeration, which is a promising replacement of the conventional vapor-compression refrigeration, requires extraordinary elastocaloric properties. Hitherto the largest elastocaloric effect is obtained in small-size films and wires of the prototype NiTi system. Here, we report a colossal elastocaloric effect, well exceeding that of NiTi alloys, in a class of bulk polycrystalline NiMn-based materials designed with the criterion of simultaneously having large volume change across phase transition and good mechanical properties. The reversible adiabatic temperature change reaches a strikingly high value of 31.5 K and the isothermal entropy change is as large as 45 J kg−1 K−1. The achievement of such a colossal elastocaloric effect in bulk polycrystalline materials should push a significant step forward towards large-scale elastocaloric refrigeration applications. Moreover, our design strategy may inspire the discovery of giant caloric effects in a broad range of ferroelastic materials. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.122.2555703 |
It is part of: | Physical Review Letters, 2019, vol. 122, p. 255703 |
URI: | http://hdl.handle.net/2445/192115 |
Related resource: | https://doi.org/10.1103/PhysRevLett.122.2555703 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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